'use strict';

import fs from 'fs';
import Base from '../base.js';

export default class extends Base {
    /**
     * index action
     * @return {Promise} []
     */
    indexAction() {
        let method = this.http.method.toLowerCase();
        if (method === "options") {
            this.setCorsHeader();
            this.end();
            return;
        }
        this.setCorsHeader();

        const _post = this.post();
        let {pageId,data,header,footer} = _post;


        header = `<div class="wqdView wqdHeaderView">${header}</div>`;
        data = `<div class="wqdView wqdCenterView">${data}</div>`;
        footer = `<div class="wqdView wqdFooterView">${footer}</div>`;

        let filePath = `${think.ROOT_PATH}/template/${pageId}.html`;
        fs.writeFileSync(filePath, data, 'utf-8');

        this.fail(200, '保存页面成功');
    }


    setCorsHeader() {
        this.header("Access-Control-Allow-Origin", this.header("origin") || "*");
        this.header("Access-Control-Allow-Headers", "x-requested-with");
        this.header("Access-Control-Request-Method", "GET,POST,PUT,DELETE");
        this.header("Access-Control-Allow-Credentials", "true");
    }


    atob(coded) {
        var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
            a256 = '',
            r64 = [256],
            r256 = [256],
            i = 0;

        var UTF8 = {

            /**
             * Encode multi-byte Unicode string into utf-8 multiple single-byte characters
             * (BMP / basic multilingual plane only)
             *
             * Chars in range U+0080 - U+07FF are encoded in 2 chars, U+0800 - U+FFFF in 3 chars
             *
             * @param {String} strUni Unicode string to be encoded as UTF-8
             * @returns {String} encoded string
             */
            encode: function (strUni) {
                // use regular expressions & String.replace callback function for better efficiency
                // than procedural approaches
                var strUtf = strUni.replace(/[\u0080-\u07ff]/g, // U+0080 - U+07FF => 2 bytes 110yyyyy, 10zzzzzz
                    function (c) {
                        var cc = c.charCodeAt(0);
                        return String.fromCharCode(0xc0 | cc >> 6, 0x80 | cc & 0x3f);
                    })
                    .replace(/[\u0800-\uffff]/g, // U+0800 - U+FFFF => 3 bytes 1110xxxx, 10yyyyyy, 10zzzzzz
                        function (c) {
                            var cc = c.charCodeAt(0);
                            return String.fromCharCode(0xe0 | cc >> 12, 0x80 | cc >> 6 & 0x3F, 0x80 | cc & 0x3f);
                        });
                return strUtf;
            },

            /**
             * Decode utf-8 encoded string back into multi-byte Unicode characters
             *
             * @param {String} strUtf UTF-8 string to be decoded back to Unicode
             * @returns {String} decoded string
             */
            decode: function (strUtf) {
                // note: decode 3-byte chars first as decoded 2-byte strings could appear to be 3-byte char!
                var strUni = strUtf.replace(/[\u00e0-\u00ef][\u0080-\u00bf][\u0080-\u00bf]/g, // 3-byte chars
                    function (c) { // (note parentheses for precence)
                        var cc = ((c.charCodeAt(0) & 0x0f) << 12) | ((c.charCodeAt(1) & 0x3f) << 6) | (c.charCodeAt(2) & 0x3f);
                        return String.fromCharCode(cc);
                    })
                    .replace(/[\u00c0-\u00df][\u0080-\u00bf]/g, // 2-byte chars
                        function (c) { // (note parentheses for precence)
                            var cc = (c.charCodeAt(0) & 0x1f) << 6 | c.charCodeAt(1) & 0x3f;
                            return String.fromCharCode(cc);
                        });
                return strUni;
            }
        };

        while (i < 256) {
            var c = String.fromCharCode(i);
            a256 += c;
            r256[i] = i;
            r64[i] = b64.indexOf(c);
            ++i;
        }


        coded = String(coded).split('=');
        var i = coded.length;
        do {
            --i;
            coded[i] = this.code(coded[i], true, r64, a256, 6, 8);
        } while (i > 0);
        coded = coded.join('');
        return coded;
    }

    code(s, discard, alpha, beta, w1, w2) {
        s = String(s);
        var buffer = 0,
            i = 0,
            length = s.length,
            result = '',
            bitsInBuffer = 0;

        while (i < length) {
            var c = s.charCodeAt(i);
            c = c < 256 ? alpha[c] : -1;

            buffer = (buffer << w1) + c;
            bitsInBuffer += w1;

            while (bitsInBuffer >= w2) {
                bitsInBuffer -= w2;
                var tmp = buffer >> bitsInBuffer;
                result += beta.charAt(tmp);
                buffer ^= tmp << bitsInBuffer;
            }
            ++i;
        }
        if (!discard && bitsInBuffer > 0) result += beta.charAt(buffer << (w2 - bitsInBuffer));
        return result;
    }
}